Channel state information reporting in wireless communications

ABSTRACT

A wireless communication method is described for receiving a reporting configuration associated with one or more reporting criteria. The received reporting configuration is also linked to one or more channel state information (CSI) resource settings that provide a configuration information. Each CSI resource setting identifies one or more resource sets, and each resource set includes one or more reference signal resources. Based on one or more reporting criteria, a user equipment can generate a report that can be transmitted to a base station.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application is a continuation and claims priority to InternationalApplication No. PCT/CN2018/081061, filed on Mar. 29, 2018, thedisclosure of which is hereby incorporated by reference herein in itsentirety.

TECHNICAL FIELD

This disclosure is directed generally to wireless communications.

BACKGROUND

Mobile telecommunication technologies are moving the world toward anincreasingly connected and networked society. In comparison with theexisting wireless networks, next generation systems and wirelesscommunication techniques will need to support a much wider range ofuse-case characteristics and provide a more complex and sophisticatedrange of access requirements and flexibilities.

Long-Term Evolution (LTE) is a standard for wireless communication formobile devices and data terminals developed by 3rd GenerationPartnership Project (3GPP). LTE Advanced (LTE-A) is a wirelesscommunication standard that enhances the LTE standard. The 5thgeneration of wireless system, known as 5G, advances the LTE and LTE-Awireless standards and is committed to supporting higher data-rates,large number of connections, ultra-low latency, high reliability andother emerging business needs.

SUMMARY

Techniques for channel state information reporting are disclosed. Anexemplary embodiment discloses a wireless communication method. Theexemplary method includes receiving a reporting configuration associatedwith one or more reporting criteria, the reporting configuration linkedto one or more channel state information (CSI) resource settings thatprovide a configuration information, where each CSI resource settingidentifies one or more resource sets, and each resource set includes oneor more reference signal resources. The exemplary method includesgenerating, according to the one or more reporting criteria, the reportthat includes at least one of a reference signal receive power (RSRP), arank indicator (RI), one or more reference signal indexes, andinformation about grouping the one or more reference signal indexes,where each reference signal index is associated with at least one of aCSI resource setting index, a reference signal resource set index, areference signal resource index, and a reporting configuration index.The exemplary method also includes transmitting the report to acommunication node.

In some embodiments, the one or more reporting criteria includes atleast one of: one or more criteria for grouping one or more referencesignal indexes to be reported, where the one or more reference signalindexes are grouped into one or more reference signal groups, a numberof reference signal (RS) resources from one resource set or from one CSIresource setting to be reported, a minimum number of RS resources fromone resource set or from one CSI resource setting to be reported, amaximum number of RS resources from one resource set or from one CSIresource setting to be reported, a number of resource sets from one CSIresource setting to be reported, a minimum number of resource sets fromone CSI resource setting to be reported, a maximum number of resourcesets from one CSI resource setting to be reported, a maximum number ofRS resources or one RS resource to be reported for one or more subsetsof one resource set, or one or more scaling factors to scale one or moremeasured RSRPs associated with one or more reference signal indexes orassociated with one or more transmission or receive spatial domainfilters.

In some embodiments, one of the criteria for grouping reference signalindexes includes at least one of a number of groups to be reported, anumber of reference signal indexes per group to be reported, or a numberof reference signal indexes per sub-group to be reported.

In some embodiments, one of the criteria for grouping includes at leastone of a maximum RSRP gap between at least two groups, a maximum RSRPgap between the respective reference signal resources associated with atleast two groups, a maximum RSRP gap between at least two referencesignal resources within one group, or a RSRP gap between one referencesignal and another reference closest to the one reference signal.

In some embodiments, the one or more scaling factors includes at leastone of: a first scaling factor for a transmission spatial domain filteror a reference signal resource in one resource set or a reference signalresource in one resource setting, wherein the first scaling factor isused to scale a measured RSRP associated with one transmission spatialdomain filter or a reference signal resource in one resource set or areference signal resource in one resource setting, or a second scalingfactor for a receive spatial filter, wherein the second scaling factoris used to scale a measured RSRP associated with the receive spatialdomain filter.

In some embodiments, the one or more reporting criteria is applied orused per reference signal group to be reported. In some embodiments, theone or more reporting criteria is configured for one reportingconfiguration, for one or more resource sets, or for one or more CSIresource settings of the one reporting configuration. In someembodiments, the one or more reporting criteria are configured via adownlink control indicator (DCI), a medium access control-controlelement (MAC-CE) or a higher layer parameter.

In some embodiments, the exemplary methods further include determiningRS indexes to be reported based on one or more subsets of one or moreresource sets, where the one or more subsets of the one or more resourcesets are dependent on the one or more reference signal resources thathave been determined to be reported.

In some embodiments, the one or more subsets of one resource set isdetermined based on one or more reference signal resources to bereported. In some other embodiments, the one or more subsets of one ormore resource sets are configured for one or more reference signalresources by the communication node.

In some embodiments, the one or more subsets of one resource set isdetermined based on any one of the following: (1) {k−1, k, k+1}, or{k−1, k, k+1} mod N, for each k, (2) {k−1−N1, k−N1, k+1−N1, k−1, k, k+1,k−1+N1, k+N1, k+1+N1}, or {k−1−N1, k−N1, k+1−N1, k−1, k, k+1, k−1+N1,k+N1, k+1+N1} mod N, for each k, (3) {k−N1, k−1, k, k+1, k+N1}, or{k−N1, k−1, k, k+1, k+N1} mod N, for each k, (4) {A+k} or {A+k}mod N,for each k, (5){A+k+B×N1}or {A+k+B×N1}mod N, for each k, (6){(k modN1+A)mod N1+└k/N1┘×N130 B×N1}, or {(k mod N1+A)mod N1+└k/N1┘×N1+B×N1}modN, for each k, where A is any one of elements from {−a1, −a1+1, ..−1,0,+1, . . . , a2} or any one of elements from subset of {−a1, −a1+1,. . −1,0,+1, . . . , a2}, B is any one of elements from {−b1, −b1+1, . .. −1,0,+1, , . . . , b2} or any one of elements from one subset of {−b1,−b1+1, . . −1, . . . , b2}, k is a RS resource index to be reported, Nis a number of reference signal resources of the one resource set, andN1, a1, a2, b1 and b2 are non-negative integers.

In some embodiments, one or more subsets of one resource set is based onvalues for N, N1, a1, a2, b1 or b2 transmitted by the communicationnode, where N, N1, a1, a2, b1 and b2 are non-negative integers.

In some embodiments, the one or more reference signal resources includeany one or more of a synchronization signal block (SSB) and a channelstate information reference signal (CSI-RS).

In another exemplary method, a wireless communication method includesproviding, by a base station to a user equipment, a reportingconfiguration associated with one or more reporting criteria, thereporting configuration linked to one or more channel state information(CSI) resource settings that provide a configuration information to theuser equipment, where each CSI resource setting includes one or moreresource sets, and each resource set includes one or more referencesignal resources. The another exemplary method also includes receivingthe report, according to the one or more reporting criteria, the reportthat includes at least one of a reference signal receive power (RSRP), arank indicator (RI), one or more reference signal indexes, andinformation about grouping the one or more reference signal indexes,where each reference signal index is associated with at least one of aCSI resource setting index, a reference signal resource set index, areference signal resource index, and a reporting configuration index.

In yet another exemplary aspect, the above-described methods areembodied in the form of processor-executable code and stored in acomputer-readable program medium.

In yet another exemplary embodiment, devices that are configured oroperable to perform the above-described methods are disclosed.

The above and other aspects and their implementations are described ingreater detail in the drawings, the descriptions, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows an exemplary user equipment (UE) with four panels in abeamforming wireless environment.

FIG. 2 shows a performance comparison between a group based and anon-group based reporting.

FIGS. 3A and 3B show simulation results for an exemplary embodiment ofan indoor hotspot (InH) with 2 UE panels.

FIGS. 3C and 3D show simulation results for an exemplary embodiment ofan InH with 4 UE panels.

FIGS. 4A and 4B show two examples of reporting configuration formultiple TRPs or multiple panels.

FIGS. 5A to 5C show examples of antenna gain as function of arrival ofangle for the perspective of beam determination.

FIG. 6 shows an example of subsets of one resource set according to oneimplicit rule.

FIG. 7 shows exemplary flowchart implemented at a user equipment togenerate a report based on one or more reporting criteria.

FIG. 8 shows an exemplary flowchart implemented at a base station toreceive a report based on a provided reporting configuration.

FIG. 9 shows a block diagram for an exemplary user equipment to generatea report based on one or more reporting criteria.

FIG. 10 shows a block diagram for an exemplary base station to receive areport based on a provided reporting configuration.

DETAILED DESCRIPTION

This patent document describes techniques that can improve wirelessperformance in a beamforming wireless environment. In some embodiments,a user equipment (UE) can generate a report based on a base stationprovided reporting configuration that is associated with one or morereporting criteria. This document will first briefly describebeamforming technology followed by four sections where several featuresand embodiments related to UE measurement reporting schemes aredescribed. The example headings for the various sections below are usedto facilitate the understanding of the disclosed subject matter and donot limit the scope of the claimed subject matter in any way.Accordingly, one or more features of one example section can be combinedwith one or more features of another example section.

For wireless systems that use a wide or ultra-wide spectrum resource(e.g., 20 MHz or greater), the propagation loss induced by the extremelyhigh frequency becomes a noticeable challenge. To solve this problem,among others, antenna array and beamforming (BF) training technologiesusing Massive MIMO may be used to achieve beam alignment and to obtain ahigh antenna gain. As an example, a Massive MIMO can include 1024antenna element for one node or a wireless communication equipment. Tokeep a low complexity and low cost of implementation while stillbenefitting from the antenna array, analog phase shifters become anattractive solution for implementing Millimeter Wave (mmWave) BF. Theuse of analog phase shifters can mean that the number of phases arefinite and that constant modulus constraints are placed on the antennaelements. Given the pre-specified beam patterns, thevariable-phase-shift-based BF training can target to generally identifythe best pattern for subsequent data transmission.

FIG. 1 shows an exemplary UE with four panels in a beamforming wirelessenvironment. The UE antenna panels 1 to 4 can be described usingvariables Mg and Ng, where Mg describes a number of panels in a columnand Ng describes a number of panels in a row. In FIG. 1, the UE antennapanels can have Mg=1 and Ng=4, where angle between panels Θmg,ng=90; Ω0,1=Ω 0,0 +90; Ω 0,2=Ω 0,0 +180; Ω 0,3=Ω 0,0 +270. Thus, in FIG. 1, thefour panel UE has 1 column panel and four row panels, where each rowpanel is arranged 90 degrees from another row panel. The spacing betweenthe UE panels in a horizontal direction (dgH) is 0 and the spacingbetween the panels in a vertical direction (dgV) is 0. Each basestations, or transmission reception point TRP, namely TRP-1 and TRP-2has an array of column and row antenna panels that can also be describedusing the variables Mg and Ng.

Generally, the multi-TRP and multi-panel cases can be considered for a5G base station (gNB) where multiple panels associated with a UE cancover a whole space for coverage. As one exemplary case, one panel forTRP and UE sides can have two transceiver units (TXRUs) that areassociated with cross polarization accordingly. Therefore, in order toachieve a high RANK transmission, the TRP and UE may use different beamsgenerated from different panels with the objective of sufficiently usingcapability of each panel, such as its associated TXRUs, or else thetransmission performance may decline. For instance, referring to FIG. 1,if a UE with four panels reports received Tx beams, such as Tx beam #1and Tx beam #2 (both of which can cover one main propagation path) withthe objective of maximizing reference signal receive power (RSRP) crossall receive (Rx) panels, then a maximum number of supported RANK can beup to two. Similarly, if a UE only reports Tx beams associated with onlyone TRP panel, such as TRP-1 in FIG. 1, then a bottleneck or unexpectedupper bound of spectral efficiency can also occur due to a limitation inthe capability of the Tx-side.

Consequently, the concept of beam grouping to be reported by a UE isdeveloped and can be further refined. For beam grouping, the beams whichcan be received simultaneously can be grouped into one group or thebeams which cannot be received simultaneously can be grouped into onegroup. Beam grouping can briefly interpret the physical feature of gNBor UE multiple panels or TRPs. In addition, beams within one group canbe further grouped into subgroup, where beam within one sub-group can beused for spatial multiplexing, or beam from different sub-groups can beused to achieve spatial multiplexing.

One approach for group based reporting has been adopted by 3GPP. Thecriteria for grouping involves the following two aspects from theperspective of the UE side. First, different Tx beams within one groupcan be simultaneously received, but Tx beams between different groupscannot be simultaneously received. Second, different Tx beams within onegroup cannot be simultaneously received, but Tx beams between differentgroups can be simultaneously received. In contrast, non-group basedreporting involves a UE reporting the best-N beams per UE irrespectiveof UE panels.

FIG. 2 shows a performance comparison between a group based and anon-group based reporting. FIG. 2 shows the performance gain in NR fromgroup based beam reporting in the case of two panels in UE sides and twoTx beams to be reported which can be received simultaneously. Theperformance gain over non-group based beam reporting is from the naturalfilter, A, or called as natural penalty factor or scaling factor, ofantenna element pattern. The function of antenna radiation pattern canbe found in the following Table 1 where (θ″, φ″) are in a localcoordinate system in 3GPP TS 38.802.

TABLE 1 UE antenna radiation pattern model 1 Parameter Values Antennaelement radiation pattern in θ″ dim (dB) $\quad\begin{matrix}{{{A_{E,V}\left( \theta^{''} \right)} = {- {\min\left\lbrack {{12\left( \frac{\theta^{''} - 90^{0}}{\theta_{3{dB}}} \right)^{2}},{SLA}_{V}} \right\rbrack}}},} \\{{\theta_{3{dB}} = 90^{0}},{{SLA}_{V} = 25}}\end{matrix}$ Antenna element radiation pattern in φ″ dim (dB)$\quad\begin{matrix}{{{A_{E,H}\left( \phi^{''} \right)} = {- {\min\left\lbrack {{12\left( \frac{\phi^{''}}{\phi_{3{dB}}} \right)^{2}},A_{m}} \right\rbrack}}},} \\{{\phi_{3{dB}} = 90^{0}},{A_{m} = 25}}\end{matrix}$ Combining method for 3D A″(θ″, φ″) = antenna elementpattern (dB) −min{−└A_(E,V)(θ″) + A_(E,H)(φ″)┘, A_(m)} Maximumdirectional gain 5 dBi of an antenna element G_(E,max)

FIGS. 3A and 3B show simulation results for an indoor hotspot (InH) with2 UE panels, and FIGS. 3C and 3D show simulation results for an indoorhotspot (InH) with 4 UE panels. By comparing FIGS. 3A to 3B with FIGS.3C to 3D, some bottlenecks of group based beam reporting can be observedwith the increase of UE panels. For instance, for 2 and 4 UE-panels,simulation results show that the gain of beam grouping declines as theUE panel number increases from 2 to 4.

3GPP New Radio (NR) Rel-15 supports the down-link (DL) beam managementfor a single DL transmission (Tx) beam single transmission receptionpoint (TRP) cases, where group based and non-group based reporting havebeen adopted for beam related reports. The non-group based reporting canreport the identities (IDs) of best-N Tx Reference signals (RS) that aremeasured with their corresponding RSRP results. However, the group basedreporting can report one group or one set of two Tx beam ID(s), whichcan be received simultaneously. A group can refer to a receive beam setor only two Rx panels on a UE. Thus, group based reporting can beenhanced by supporting the reporting of multiple groups or multiple setsof Tx beam ID.

Because different panels can have different orientation, theirboresight, or the direction of maximum gain, over physical propagationchannel can be different. Thus, the group based reporting can beperformed based on the orientations of the different panels so thatlow-correlation beam groups can be formed. Accordingly, a higher RANKtransmission can be supported for system throughput. Compared withnon-group based reporting, group based reporting can improve the systemperformance at least in terms of spectrum efficiency in the case of, forexample, a two-panel UE architecture.

At least some or all of the following three technical problems can besolved by some embodiments when multi-beam or multi-TRP is considered.First, as described in the simulation results of FIGS. 3A and 3B, withthe increase of UE panels the performance gain of group based reportingover non-group may not be distinct. With the objective of maximizingL1-RSRP, Tx-Rx beams generated by neighboring panels may point to thesame physical paths or clusters with higher probability even when usinggroup based reporting.

Second, the results of group based reporting may be beyond thecapability of the gNB or TRPs, especially when taking into account asmall cell scenario. In the case of multi-TRP or multi-panel, more thanone Tx beams can be transmitted simultaneously from the perspective ofTRP. For the different TRP, the maximum number of Tx beams that can betransmitted can be different. Thus, the benefits from beam grouping canbe limited if a UE reports a number of Tx beams to be simultaneouslyreceived that is more than the gNB or TRP's capability of simultaneouslytransmission.

Third, in the case of multiple TRP, the experienced propagation pathfrom different TRPs can be different. From the perspective of systemperformance, these Tx beams can have a low intra-interference with thebest Tx beam and can support the higher layer transmission. But with theobjective of maximizing L1-RSRP, the beams from some certain TRP cannotsatisfy the condition of best-N and are not reported.

In this patent document, the term beam can refer to a configuration ofreference signaling, reference signal, spatial filter or precoding. Theterm Tx beam can refer to DL or uplink (UL) reference signaling, such asChannel State Information Reference Signal (CSI-RS), synchronizationsignaling block (SSB), demodulation reference signal (DMRS), SoundingReference Signal (SRS), Tx spatial domain filter, or Tx precoding. Theterm Rx beam can refer to spatial domain filter, Rx spatial domainfilter, or Rx precoding. Further, the term beam ID can refer toreference signaling index, spatial domain filter index or precodingindex. The term group can refer to the UE reporting behavior of implicitrepresenting of some DL RS IDs sharing the same or similar channel orreception properties, such as whether or not simultaneously received,quasi-co location, quasi-co beam, or spatial multiplexing. The terms setor sub-set can refer to the gNB configuration on DL RSs for beammanagement according to the same or similar transmission properties,such as whether or not simultaneously transmitted or a limited number.

I. Embodiment #1-Measurement and CSI Resource Setting for Multi-Panel orMulti-TRP

To achieve the beam measurement, a resource configuration for multiplepanels or multiple TRPs can be performed, where panel or TRP dedicatedinformation can be distinguished through a resource set or a CSIresource setting. A resource set may include one or more DL RSs such asa synchronization signaling block (SSB) or a channel state informationreference signal (CSI-RS). SSB is also called as synchronization signal(SS)/physical broadcast channel (PBCH) block (SS/PBCH). A CSI resourcesetting may include some common configuration information, such astiming behavior (e.g., periodic, aperiodic, semi-persistent) orbandwidth that can enable a UE to measure the DL RSs. In someembodiments, a resource set or a CSI resource setting can be associatedwith one TRP or one panel. From the perspective of gNB, in multi-panelor TRP cases, one or more resource sets, for example, 0˜NTRP-1 resourcesets, can be configured so that each resource set can correspond to oneTRP or one panel and each resource set can include one or more DL RSs.The DL RSs within the set are generated from its associated TRP orpanel.

Taking into account the TRP or panel's capability, the number of Txbeams which can be transmitted simultaneously can be limited, where Txbeams can be equivalent to the DL RSs. For instance, in a scenario wherethere are two TRPs in one cell, TRP-A can generate two different Txbeams simultaneously, but TRP-B can generate one Tx beam simultaneouslyin one time instance.

Therefore, as further described below, in some embodiments, thereporting configuration can include a criterion, for example,Nsimu_num_max, that can describe a maximum number of Tx beams to betransmitted simultaneously per resource set. In some embodiments, forthe CSI or beam reporting perspective, Nsimu_num_max can be consideredthe upper bound of TRP or panel capability, but another criteriaNsimu_num, which can be defined by the number of Tx beams to bereported, can be configured for each set as one reporting restriction orconstraint so that Nsimu_num can be less than Nsimu_num_max throughgNB/TRP signaling configuration. Notice that, if only Nsimu_num_max isconfigured rather than Nsimu_num, the actual number for Tx beams to bereported can be assumed to be one UE implementation issue, where moreflexibilities are achieved in UE sides.

II. Embodiment #2-Exemplary Framework for CSI Reporting

FIGS. 4A and 4B show two examples of reporting configuration formultiple TRPs or multiple panels. In some embodiments, as shown in FIG.4A, a CSI reporting framework can include a reporting configuration 402a (also known as a reporting setting) that may be linked with onechannel state information (CSI) resource setting 404 a (also known asresource setting) that is associated with one or more CSI resource sets406 a-410 a, (also called as resource set). Each resource set caninclude either CSI-RS or SSB or both CSI-RS and SSB. In this exemplaryframework, the information about differentiating multi-TRP andmulti-panel is represented by CSI resource set. Thus, in someembodiments, each CSI resource set is associated with each TRP that mayhave multiple antenna panels, or is associated with each antenna panelfrom the same or different TRPs. In some other embodiments, more thanone resource sets can be configured for one TRP or one panel so thatmore than one set can be triggered for aperiodic beam reporting crossmultiple slot. Thus, in some embodiments, a base station can provide toa UE a reporting configuration that is associated with one CSI resourcesetting that provide configuration information to the UE, where the oneCSI resource setting identifies one or more resource sets, and eachresource set included one or more reference signal resources.

FIG. 4B shows another exemplary framework where the reportingconfiguration is linked with one or more CSI resource setting. In suchan exemplary framework, the reporting configuration can be linked withmore than one CSI resource setting, where each CSI resource settingincludes or identifies one or more CSI resource sets, and each CSIresource set includes a CSI-RS or SSB or both CSI-RS and SSB. In thisframework, the information about TRP can be differentiated from CSIresource setting, and then the information about panel per TRP can bedifferentiated from the CSI resource set per CSI resource setting. Thus,in some embodiments, a base station can provide to a UE a reportingconfiguration that is associated with one or more CSI resource settingsthat provide configuration information to the UE, where each CSIresource setting identifies one or more resource sets, and each resourceset included one or more reference signal resources.

After the UE performs its measurement and generates a report, the UEsends or reports to the gNB the generated report associated with orlinked to the CSI resource setting. In some embodiments, the reportgenerated by the UE can include at least one of the following for beammanagement: CSI-RS Resource Index (CRI), CSI-RS resource set identifier(ID), CSI-RS resource setting ID, reporting configuration ID, a SSBresource indicator, RSRP, rank indicator (RI), one or more referencesignal indexes, and information about grouping the one or more referencesignal indexes. In some embodiments, each reference signal index isassociated with any one or more of a CSI resource setting index, areference signal resource set index, a reference signal resource index,and a reporting configuration index.

III. Embodiment #3- Reporting Configuration or Reporting Setting

In some embodiments, one or more criteria of beam reporting setting orreporting configuration can be configured by a base station orpre-defined for beam reporting. Some of the reporting criteria listedbelow in numbers 1 to 8 are examples of the one or more reportingcriteria. The one or more reporting criteria can be configured for onereporting configuration or the one or more reporting criteria can beconfigured or pre-defined for one or more CSI resource settingsassociated with the one reporting configuration, where the one or morereporting criteria can be used together for all CSI resource setting orall resource set, or the one or more reporting criteria is separatelyconfigured per CSI resource setting or per resource set. In someembodiments, the one or more reporting configuration can be configuredfor one or more resource sets. One benefit of configuring a reportingconfiguration is that the information provided by a UE based on thereporting configuration can be used by the base station to handle theissues introduced by the multiple TRP and multiple panel. In someembodiments, a UE can be configured to provide a report based on one ormore reporting criteria that can be configured and transmitted by a basestation to a UE using a radio resource control (RRC) higher layerparameter, a medium access control-control element (MAC-CE) signaling,or a downlink control information (DCI).

1. Linkage or Mapping between Reporting Configuration and ResourceSetting

In some embodiments, a gNB can configure the reporting configuration tobe associated with one or more CSI resource setting, where the gNB canconfigure each CSI resource setting to be associated with one or moreone CSI resource set. A reporting criterion can include at least one ofa number of resource sets from one CSI resource setting to be reported,a minimum number of resource sets from one CSI resource setting to bereported, or a maximum number of resource sets from one CSI resourcesetting to be reported.

2. Criteria of Grouping and/or a Number of Groups or a Number of Beamswithin Group

In some embodiments, one or more criteria are used to group one or morereference signal resources. The one or more reference signal resourcescan be grouped to form one or more reference signal groups to bereported. For instance, one or more reference signal indexes can begrouped to form one or more reference signal groups to be reported. Onecriteria for grouping reference signal indexes may include at least oneof a number of groups to be reported, a number of beam (or referencesignal indexes) per group to be reported, or a number of beam (orreference signal indexes) per sub-group to be reported, where one “beam”can be equivalent to one reference signal index. For instance, gNBconfigures one or more of the following grouping approaches as onecriteria for the associated reporting. First, different Tx beams withinone group can be simultaneously received, but Tx beams between differentgroups cannot be simultaneously received. Second, different Tx beamswithin one group cannot be simultaneously received, but Tx beams betweendifferent groups can be simultaneously received. Third, different Txbeams for the same sub-group can be spatially multiplexed, but Tx beamsfrom different groups cannot be spatially multiplexed. Fourth, differentTx beams for the different sub-group and same group can be spatiallymultiplexed, where different Tx beams for the same sub-group and samegroup may not be possible to be spatially multiplexed. Fifth, differentTx beams for different group and same sub-group can be spatiallymultiplexed, where different Tx beams for the same group and samesub-group may not be possible to be spatially multiplexed but thesedifferent Tx beams can be received simultaneously at the UE.

In some embodiments, the one or more reporting criteria can be providedby a base station and applied or used by a user equipment per referencesignal group to be reported.

3. Maximum RSRP Gap of Intergroups or Intra-Groups TRSRP or Relative Gapwith Closed to the RSRP to be Reported

Another criterion for grouping can include at least one of a maximumRSRP gap between at least two groups (or RSRP gap of inter-groups), or amaximum RSRP gap between at least two reference signal resources withinone group (or intra-group TRSRP), or a maximum RSRP gap between therespective reference signal resources associated with at least twogroups, or a relative RSRP gap to be reported between the RSRPs of onereference signal resource that is closest to another reference signalresource. As an example, in a scenario where there are three beams toreported, and the RSRP of the first best beam is −70 dB, the RSRP ofsecond best beam is −80 dB, then the relative gap can be between a thirdbest beam and the closest RSRP, e.g., the second best beam with RSRP of−80 dB rather than −70 dB. In some embodiments, the maximum RSRP of agroup may not be TRSRP lower than the best group with the objective ofmaximizing RSRP. The RSRP of beam within one group may not be TRSRPlower than its best beam with the objective of maximizing RSRP;

4. Maximum Number Nsimu_max of Tx Beam to be Reporting for One ResourceSet or One Resource Setting

In some embodiments, one reporting criteria can include a number ofmaximum simultaneous Tx beam, up to Nsimu_max to be reporting for oneresource set or CSI resource setting. In some embodiments, a number ofTx beams to be reporting for one resource set or for one resourcesetting within one reported group or within all reported groups can beno more than Nsimu_max, which can be depended on the capability of a TRPor gNB to simultaneously transmit Tx beams.

Nsimu_max can be configured by gNB or pre-defined. In some embodimentswhere Nsimu_max is configured, the Nsimu_max can be included by the gNBin the reporting configuration signal or as one constraint configured ina resource set or a resource setting. In some embodiments whereNsimu_max is pre-defined, Nsimu_max can be, for example, one or two.

On the UE side, in some embodiments, the UE can assume that up toNsimu_max Tx beams can be selected within one group, if the criteria ofgroup based reporting is that different Tx beams within one group can besimultaneously received, but Tx beams between different groups cannot besimultaneously received. In some other embodiments, the UE can assumethat up to Nsimu_max Tx beams can be selected for all groups whereNsimu_max is one or two, if the criteria of group based reporting isdifferent Tx beams within one group cannot be simultaneously received,but Tx beams between different groups can be simultaneously received.

5. Alpha: Penalty Factor or Scaling Factor for Rx Beam in the case of UEMulti-Panel

In some embodiments, one reporting criteria can include a penaltyfactor, also known as a scaling factor for a Rx beam. As a function ofRx beam orientation, also known as arrival of angle, Alpha can beconfigured by gNB per cell, per UE or per beam group, to impact L1-RSRPdetermination according to different Rx beam orientation. Thus, theAlpha scaling factor can be used to scale one or more measured RSRPs ofone or more receive beams.

In some embodiments, rather than using the measured L1-RSRP, the L1-RSRPcan be scaled by the UE for beam determination using Alpha. Thus, as anexample, the UE can select the best Tx beams according to the scaledRSRP. For instance, the following formulas for Alpha α(θ″) can be usedwhere θ″ denotes angle of arrival.

A_(EV)(θ)^(*)1 ⇒ A_(EV)(θ)^(*)α(θ)${e.g.},{{\alpha (\theta)} = {- {\min \left\lbrack {{12\left( \frac{\theta - {90^{{^\circ}}}}{\theta_{3dB}} \right)^{2}},\ {SLA}_{V}} \right\rbrack}}},{\theta_{3dB} = {45^{{^\circ}}}},{{SLA}_{V} = 25}$${{s.t.\mspace{11mu} {A_{E,V}(\theta)}} = {- {\min \left\lbrack {{12\left( \frac{\theta - 90^{{^\circ}}}{\theta_{3dB}} \right)^{2}},{SLA}_{V}} \right\rbrack}}},{\theta_{3dB} = {90^{{^\circ}}}},{{SLA}_{V} = {25}}$

FIGS. 5A to 5C show examples of antenna gain as function of arrival ofangle for the perspective of beam determination. FIG. 5A shown anAntenna gain A {E,V}, which is introduced by one physical antennapattern according to 3GPP TS 38.802:

${{A_{E,V}(\theta)} = {- {\min \left\lbrack {{12\left( \frac{\theta - 90^{{^\circ}}}{\theta_{3dB}} \right)^{2}},{SLA}_{V}} \right\rbrack}}},{\theta_{3dB} = {90^{{^\circ}}}},{{SLA}_{V} = 25.}$

FIG. 5B shows an antenna gain with a penalty factor of alpha(theta),where we have

${{\alpha (\theta)} = {- {\min \left\lbrack {{12\left( \frac{\theta - 90^{{^\circ}}}{\theta_{3dB}} \right)^{2}},{SLA}_{V}} \right\rbrack}}},{\theta_{3dB} = 45^{{^\circ}}},{{SLA}_{V} = 25.}$

In comparison of the real antenna gain over vertical angular, theobservation more focusing on the 60˜120 degree can be achieved accordingto the recommended approach with penalty factor of A_{E,V} *alpha(theta). Therefore, for the perspective of beam determination, theantenna gain is changed from A_{E,V} into A_{E,V} * alpha(theta) asshown in the FIG. 5C.

Additionally, the following formulas for Alpha α(θ″) can be used in dBunit where θ″ denotes angle of arrival.

A_(E, V)(θ) + 0 ⇒ A_(E, V)(θ) + α(θ)${e.g.},{{\alpha (\theta)} = {- {\min \left\lbrack {{12\left( \frac{\theta - {90^{{^\circ}}}}{\theta_{3dB}} \right)^{2}},\ {SLA}_{V}} \right\rbrack}}},{\theta_{3dB} = {45^{{^\circ}}}},{{{SL}A_{V}} = 25}$${{s.t.\mspace{11mu} {A_{E,V}(\theta)}} = {- {\min \left\lbrack {{12\left( \frac{\theta - 90^{{^\circ}}}{\theta_{3dB}} \right)^{2}},{SLA}_{V}} \right\rbrack}}},{\theta_{3dB} = {90^{{^\circ}}}},{{{SL}A_{V}} = 25}$

In beam determination, the following RSRP in dB can be used afterscaling according to the latter approach of introducing of alpha, whereB denotes the index of Tx beam and θ_(B) denotes the orientation of Rxbeam corresponding to the Tx beam.

RSRP_(scaling)(B)=RSRP_(meas)(B)−2*α(θ_(B))

6. Beta: Penalty Factor or Scaling Factor for Tx Beam in the Case of gNBMulti-Panel or TRP.

In some embodiments, one reporting criteria can include a penaltyfactor, also known as a scaling factor for a Tx beam or a referencesignal resource in one resource set or a reference signal resource inone resource setting. Once the Tx beam of the resource set-A isselected, the measured L1-RSRP of other Tx beam from the resource set-Acan be scaled by Beta for the perspective of beam determination for allreports, or beam determination of beam group to be reported. Thus, theBeta scaling factor can be used to scale one or more measured RSRPs ofone or more transmit beams or reference signal resources.

An example is shown in the equation below where two resource sets areconfigured for gNB. The two resource sets are represented by set-Z1 andset-Z2. With the objective of maximizing RSRP, the best RSRP associatedwith one RS from one of set-Z1 and set-Z2 can be represented as X1. IfX1 belongs to one of the two sets, RSRP for each element of theassociated set can be subtracted by Beta. Then, by going back, thecurrent best beams can be selected according to scaled RSRP except X1.

-   -   Loop-B (within one group)    -   X1=argmax L1-RSRP (set-Z1, set-Z2)    -   L1-RSRP(Z1)=L1-RSRP(Z1)-Beta, for each element of set Z1, and        remove X1 from set-Z1, if X1 belongs to Z1    -   L1-RSRP(Z2)=L1-RSRP(Z2)-Beta, for each element of set Z2, and        remove X1 from set-Z2, if X1 belongs to Z2    -   Go Loop-B

In some embodiments, beta can be predefined, such as 5 dB. In some otherembodiments, beta can be configured by gNB per cell, per UE or perresource set.

7. NBeta_Min and NBeta for One Resource Set or CSI Resource Setting

In some embodiments, a number of Tx beams (or a number of referencesignals), NBeta to be reported for one resource set or for one resourcesetting within one reported group or within all reported groups can beno less than NBeta_min Tx beams, which can guarantee at least NBeta_minTx beam to be reported per group. Thus, in some embodiments, onereporting constraint can include a minimum number of RS resources thatcan describe NBeta_min, from one resource set or from one CSI resourcesetting to be reported. Further, in some embodiments, another reportingconstraint can include a maximum number of RS resources that candescribe up to NSimu_max resources from one resource set or from one CSIresource setting to be reported.

NBeta_min or NBeta can be configured by gNB or pre-defined. In someembodiments where NBeta_min or NBeta is configured, the NBeta_min orNBeta is included in the reporting configuration signal or as oneconstraint configured in resource set or resource setting. In someembodiments where NBeta_min or NBeta is pre-defined, NBeta_min can be,for example, one, or NBeta can be, for example, two.

8. NGamma_max for One Subset of One Resource Set

In some embodiments, a number of Tx beam to be reported for one subset,according to an implicit or default rule, that may not be more than areporting criterion of NGamma_max. In some embodiments, NGamma_max maydescribe a maximum number of RS resources to be reported for one or moresubsets of one resource set. In some other embodiments, as an example,NGamma_max may be 1, to describe one RS resource. The implicit rule forgenerating one or more subsets of one resource set may include at leastone of the rules shown below, where k, N, N1, N2 denote the location orlocal index of the Tx beams or reference signal resources within oneresource set to be reported, a number of RSs of one resource set, arange of horizontal-domain DL RSs, and a range of vertical-domain DLRSs, respectively. It is assumed that the ID of DL RS is from 0 to N−1:

-   -   {k−1, k, k+1} or {k−1,k,k+1} mod N, for each k;    -   {k−1−N1, k−N1, k+1−N1, k−1, k, k+1, k−1+N1, k+N1, k+1+N1}, or        {k−1−N1,k−N1,k+1−N1, k−1,k,k+1, k−1+N1, k+N1, k+1+N1} mod N, for        each k;    -   {k−N1, k−1, k, k+1, k+N1}, or { k−N1, k−1,k,k+1, k+N1 } mod N,        for each k;    -   {k−1−N2,k−N2,k+1−N2, k−1,k,k+1, k−1+N2,k+N2,k+1+N2} mod N, for        each k;    -   {k−N2, k−1,k,k+1, k+N2} mod N, for each k;

Additionally, the following one general example can be used forgenerating subset of each resource set to be generated by {A+k} {A+k}modN{A+k+B×N1}, {A+k+B×N1}mod N {(k mod N1+A)mod N1+└k/N1┘×N1+B×N1}, or {(kmod N1+A)mod N1+└k/N1┘×N1+B×N1}mod N, for each k, where A is any one ofelements from {−a, −a+1, . . −1,0,+1, . . . , a} or any one of elementsfrom subset of {−a, −a+1, . . −1,0,+1, . . . , a}, and B is any one ofelements from {−b, −b+1, . . −1,0,+1, . . . , b} or any one of elementsfrom subset of {−b, −b+1, . . −1,0,+1, . . . , b}, where k is thereference signal resource index to be reported, N is a non-negativeinteger and can describe a number of reference signal resources of oneresource set, N1 is a non-negative integer and can describe a range ofreference signal resources in one domain, and a and b are non-negativeintegers. In additionally, the range of A or B is determined by thevalue of B or A to be selected.

In some embodiments, the subset of {−a, −a+1, . . −1,0,+1, . . . , a} isdetermined by the value of which b is selected from {−b, −b+1, . .−1,0,+1, . . . , b}. For instance, in the case of subset of eachresource set to be generated by {A+k+B×N1}mod N, B={−2, −1,0, 1,2}, andthen we have A={0} for B=−2 or 2; A={−1,0,1} for B=−1 or 1; or A={−2,−1,0,1,2} for B=0, where b=2 and a=2. Additionally, in some embodiment,A can be any one of elements from {−a1, −a1+1, . . −1,0,+1, . . . , a2}or any one of elements from subset of {−a1, −a1+1, . . −1,0,+1, . . . ,a2}, B can be any one of elements from {−b1, −b1+1, . . −1,0,+1, . . . ,b2} or any one of elements from one subset of {−b1, −b1+1, . . −1,0,+1,. . . , b2}, where a1, a2, b1 and b2 are non-negative integers.

In some embodiments, values for N, N1, a, b, (or a1, a2, b1 and b2) andN2 can be indicated to UE by gNB.

In some embodiments, determining RS indexes to be reported is based onone or more subsets of one or more resource sets, where the one or moresubsets of one or more resource sets can depend on the RS resources thathave been determined to be reported, e.g., k. For instance, a UE selectsthe first RS (e.g. by the best RSRP) from one or more lists (or pools)of RSs, e.g., one or more resource sets. Based on the first selected RSand the criteria depending on the selected RS, e.g., according to thesubset generated by {A+k+B×N1}mod N, UE can updates the list by removingsome RSs, e.g., with indexes of {A+k+B×N1 } mod N, from one list, e.g.,one resource set, associated with the first selected RS; then, UEselects the 2nd RS (e.g. by the best RSRP) from the updated lists. Basedon the 2nd selected RS and the criteria depending on the selected RS,the UE can update the list by removing some RSs from one associated listaccordingly, etc. Thus, in some embodiments, one or more subsets of oneor more resource sets can be determined based on a number of RSresources to be reported. In some other embodiments, one or more subsetsof one or more resource sets can be configured for a number of RSresources by the communication node.

FIG. 6 shows an example of subsets of one resource set according to oneimplicit rule.

IV. Embodiment #4-Beam Determinations for Non-Group Based Reporting

In non-group based reporting, gNB can configure the reportingconfiguration by disabling group based reporting. One reportingconfiguration can include one RS setting which can include multiple RSset. As constraints for non-group based reporting, the following aspectsor the portion of the following may be configured by a gNB or predefinedin a specification:

Maximum number of Tx beam to be reporting for each resource setN_(simu_max,) e.g., 2

Alpha α(θ″), e.g., θ_(3dB)=45°

Beta, e.g., 5dB

Minimum number of Tx beam to be reported for each set N_(Beta_min,)e.g., 1

Maximum number for one subset of each resource set N_(Gamma_max,) e.g.,1

The above parameter also can be configured per resource set. Further, insome embodiments, a same parameter associated with two or more sets canhave the same value.

According to above constraint, beam reporting {×1, . . . ×N} can bereported by a UE to a gNB according to UE measurement, where xkrepresent the index of DL RS to be measured for beam management

V. Embodiment #5 -Beam Determinations for Group Based Reporting

Currently, two criteria of beam grouping involve the following aspectsfrom the perspective of UE side. First, different Tx beams within onegroup can be simultaneously received, but Tx beams between differentgroups cannot be simultaneously received. Second, different Tx beamswithin one group cannot be simultaneously received, but Tx beams betweendifferent groups can be simultaneously received.

The two grouping criterion are discussed respectively.

Regarding the Alt-1 grouping, the grouping rule is summarized as below.a) Different Tx beam within one group can be received simultaneously,and b) different Tx beam from different group cannot be receivedsimultaneously.

As constraints for group based reporting, the following aspects or theportion of the following are configured:

Criteria of grouping approach, e.g., Alt-1

The number of groups to be reported, e.g., J

The number of beam per group to be reported, e.g., N

Maximum RSRP gap of inter-group T_(RSRP)=5 dB

Maximum number of Tx beam to be reporting for each resource setN_(simu_max,) e.g., 2

Alpha α(θ″), e.g., θ_(3dB)45°

Beta, e.g., 5dB

Minimum number of Tx beam to be reported for one set N_(Beta_min,) e.g.,1

Maximum number for one subset of each resource set N_(Gamma_max,) e.g.,1

The above parameter also can be configured per resource set. Further, insome embodiments, a same parameter associated with two or more sets canhave the same value.

According to above reporting constraint, the following contents of beamreporting are reported to gNB according to UE measurement, where xkrepresent the index of DL RS to be measured for beam management:

Reported group-1{x_(1_1), x_(1_2), x_(1_3), . . . , x_(1 _N)};

Reported group-2{x_(2_1,)x_(2_2,), x_(2_3), . . . , x_(2_N)};

. . .

Reported group-J {x_(J_1,), x_(J_2,)x_(J_3), . . . , x_(J_N)}.

Regarding the Alt-1 grouping, the grouping rule is summarized as below.a) Different Tx beam within one group cannot be received simultaneously,b) different Tx beam from different group can be receivedsimultaneously.

As constraints for non-group based reporting, the following aspects orthe portion of the following are configured:

Criteria of grouping approach, e.g., Alt-2

The number of groups to be reported, e.g., J

The number of beam per group to be reported, e.g., N

Maximum RSRP gap of intra-group T_(RSRP)=15 dB

Maximum number of Tx beam to be reporting for each resource setN_(simu_max,) e.g., 2

Alpha α(θ″) e.g., θ_(3dB)45°

Beta, e.g., 5 dB

Minimum number of Tx beam to be reported for one resource setN_(Beta_min,)e.g., 1

Maximum number for one subset of each resource set N_(Gamma_max,) e.g.,1

The above parameter also can be configured per resource set. Further, insome embodiments, a same parameter associated with two or more sets canhave the same value.

According to above constraint, the following contents of beam reportingare reported to gNB according to UE measurement, where xk represent theindex of DL RS to be measured for beam management:

Reported group-1{x_(1_1), x_(1_2), x_(1_3), . . . , x_(1 _N)};

Reported group-2{x_(2_1,)x_(2_2,), x_(2_3), . . . , x_(2_N)};

. . .

Reported group-J {x_(J_1,), x_(J_2,)x_(J_3), . . . , x_(J_N)}.

FIG. 7 shows exemplary flowchart implemented at a user equipment togenerate a report based on one or more reporting criteria. At thereceiving operation 702, a user equipment receives a reportingconfiguration associated with one or more reporting criteria. Thereporting configuration is linked to one or more channel stateinformation (CSI) resource settings that provide configurationinformation. Each CSI resource setting can identify one or more resourcesets, and each resource set can include one or more reference signalresources. The one or more reference signal resources can include anyone or more of a synchronization signal block (SSB) and a channel stateinformation reference signal (CSI-RS).

At the generating operation 704, the user equipment generates, accordingto the one or more reporting criteria, the report that includes at leastone of a reference signal receive power (RSRP), a rank indicator (RI),one or more reference signal indexes, and information about grouping theone or more reference signal indexes. Each reference signal index can beassociated with at least one of a CSI resource setting index, areference signal resource set index, a reference signal resource index,and a reporting configuration index.

At the transmitting operation 706, the user equipment transmits thereport to a communication node, such as a gNB.

With respect to FIG. 7 and FIG. 8, as further described below, thefollowing features may be practiced. In some embodiments, the one ormore reporting criteria includes at least one of (1) one or morecriteria for grouping one or more reference signal indexes to bereported, where the one or more reference signal indexes are groupedinto one or more reference signal groups, (2) a number of referencesignal (RS) resources from one resource set or from one CSI resourcesetting to be reported, (3) a minimum number of RS resources from oneresource set or from one CSI resource setting to be reported, (4) amaximum number of RS resources from one resource set or from one CSIresource setting to be reported, (5) a number of resource sets from oneCSI resource setting to be reported, (6) a minimum number of resourcesets from one CSI resource setting to be reported, (7) a maximum numberof resource sets from one CSI resource setting to be reported, (8) amaximum number of RS resources or one RS resource to be reported for oneor more subsets of one resource set, or (9) one or more scaling factorsto scale one or more measured RSRPs associated with one or morereference signal indexes or associated with one or more transmission orreceive spatial domain filters. In some embodiments, one of the criteriafor grouping reference signal indexes can include at least one of anumber of groups to be reported, a number of reference signal indexesper group to be reported, or a number of reference signal indexes persub-group to be reported. In some embodiments, one of the criteria forgrouping can include at least one of a maximum RSRP gap between at leasttwo groups, a maximum RSRP gap between the respective reference signalresources associated with at least two groups, a maximum RSRP gapbetween at least two reference signal resources within one group, or aRSRP gap between one reference signal and another reference closest tothe one reference signal.

In some embodiments, RS indexes can be determined to be reported basedon one or more subsets of one or more resource sets, where the one ormore subsets of the one or more resource sets can depend on the one ormore reference signal resources that have been determined to bereported.

In some embodiments, the one or more reporting criteria can be appliedor used per reference signal group to be reported. In some embodiments,the one or more reporting criteria can be configured for one reportingconfiguration, for one or more resource sets, or for one or more CSIresource settings of the one reporting configuration. In someembodiments, the one or more reporting criteria can be configured via adownlink control indicator (DCI), a medium access control-controlelement (MAC-CE) or a higher layer parameter transmitted by acommunication node, such as a gNB.

In some embodiments, the one or more scaling factors includes at leastone of: (1) a first scaling factor for a transmission spatial domainfilter or a reference signal resource in one resource set or a referencesignal resource in one resource setting, where the first scaling factoris used to scale a measured RSRP associated with one transmissionspatial domain filter or a reference signal resource in one resource setor a reference signal resource in one resource setting, and (2) a secondscaling factor for a receive spatial filter, where the second scalingfactor is used to scale a measured RSRP associated with the receivespatial domain filter.

In some embodiments, a UE can determine RS indexes to report based onone or more subsets of one or more resource sets. The one or moresubsets of one or more resource sets can depend on the one or morereference signal resources that have been determined to be reported. Insome embodiments, the one or more subsets of one resource set can bedetermined based on one or more reference signal resources to bereported. In some other embodiments, the one or more subsets of one ormore resource sets are configured for one or more reference signalresources by the communication node.

In some embodiments, one or more subsets of one resource set can bedetermined based on any one of the following: (1) {k−1, k, k+1} or{k−1,k,k+1} mod N, for each k, (2) {k−1−N1, k−N1, k+1−N1, k−1, k, k+1,k−1+N1, k+N1, k+1+N1}, or {k−1−N1,k−N1,k+1−N1, k−1, k, k+1,k−N1, k+N1,k+1+N1}, mod N, for each k, (3) {k−N1, k−1, k, k+, k+N1} or {k−N1, k−1,k, k+1, k+N1}, mod N, for each k, (4) {A+k}mod N, for each k, (5){A+k+B−N1}, or {A+k+B×N1}mod N, for each k, (6) {k mod N1+A)modN1+└k/N1┘×N1+B×N1}, or {(k mod N1+A)mod N1+└k/N1┘×N1+B×N1}mod N for eachk, where A is any one of elements from {−a1, −a1+1, . . −1,0,+1,, . . ., a2} or any one of elements from subset of {−a1, −a1+1, . . −1,0,+1, .. . , a2}, B is any one of elements from {−b1, −b1+1, . . −1,0,+1, . . ., b2} or any one of elements from one subset of {−b1, −b1+1, . .−1,0,+1, . . . , b2}, k is a RS resource index to be reported, N is anumber of reference signal resources of the one resource set, and N1,a1, a2, b1 and b2 are non-negative integers. In some embodiments, one ormore subsets of one resource set can be based on values for N, N1, a1,a2, b1 or b2 transmitted by a communication node, where N, N1, a1, a2,b1 and b2 are non-negative integers.

FIG. 8 shows an exemplary flowchart implemented at a base station toreceive a report based on a provided reporting configuration. At theproviding operation 802, a communication node provides or transmits to auser equipment information related to a reporting configuration. Thereporting configuration can be associated with one or more reportingcriteria, and the reporting configuration can be linked to one or morechannel state information (CSI) resource settings that provideconfiguration information to the user equipment. Each CSI resourcesetting can include one or more resource sets, and each resource set caninclude one or more reference signal resources.

At the receiving operation 804, the base station can receive the report,according to the one or more reporting criteria, the report thatincludes at least one of a reference signal receive power (RSRP), a rankindicator (RI), one or more reference signal indexes, and informationabout grouping the one or more reference signal indexes. Each referencesignal index can be associated with at least one of a CSI resourcesetting index, a reference signal resource set index, a reference signalresource index, and a reporting configuration index.

FIG. 9 shows a block diagram for an exemplary user equipment to generatea report based on one or more reporting criteria. The user equipment 900includes at least one processor 910 and a memory 905 having instructionsstored thereupon. The instructions upon execution by the processor 910configure the user equipment 900 to perform several operations using thevarious modules of FIG. 9. The transmitter 915 transmits the informationor data to a communication node, such as a gNB. The receiver 920receives the information or data transmitted by the communication node.The module for receiving reporting configuration 925 receives areporting configuration that is associated with one or more reportingcriteria and that is linked to one or more channel state information(CSI) resource settings that provide configuration information to theuser equipment.

The module for generating a report 930, generates a report according tothe one or more reporting criteria. The report can include any one ormore of a reference signal receive power (RSRP), a rank indicator (RI),one or more reference signal indexes, and information about grouping theone or more reference signal indexes. Each reference signal index can beassociated with at least one of a CSI resource setting index, areference signal resource set index, a reference signal resource index,and a reporting configuration index. The generated report can betransmitted via the transmitter 915 to a communication node, such as agNB.

FIG. 10 shows a block diagram for an exemplary base station to receive areport based on a provided reporting configuration. The base station1000 includes at least one processor 1010 and a memory 1005 havinginstructions stored thereupon. The instructions upon execution by theprocessor 1010 configure the base station 1000 to perform severaloperations using the various modules of FIG. 10. The transmitter 1015transmits the information or data to one or more user equipment. Thereceiver 1020 receives the information or data transmitted by the one ormore user equipment.

The module for providing reporting configuration 1025 can provideinformation related to a reporting configuration for transmission to auser equipment. The reporting configuration can be associated with oneor more reporting criteria, and the reporting configuration can belinked to one or more channel state information (CSI) resource settingsthat provide configuration information to the user equipment. Each CSIresource setting can include one or more resource sets, and eachresource set can include one or more reference signal resources.

The module for receiving report 1030 can receive the report from a userequipment according to the one or more reporting criteria. The reportcan include any one or more of a reference signal receive power (RSRP),a rank indicator (RI), one or more reference signal indexes, andinformation about grouping the one or more reference signal indexes.Each reference signal index can be associated with at least one of a CSIresource setting index, a reference signal resource set index, areference signal resource index, and a reporting configuration index.

In this document the term “exemplary” is used to mean “an example of”and, unless otherwise stated, does not imply an ideal or a preferredembodiment.

Some of the embodiments described herein are described in the generalcontext of methods or processes, which may be implemented in oneembodiment by a computer program product, embodied in acomputer-readable medium, including computer-executable instructions,such as program code, executed by computers in networked environments. Acomputer-readable medium may include removable and non-removable storagedevices including, but not limited to, Read Only Memory (ROM), RandomAccess Memory (RAM), compact discs (CDs), digital versatile discs (DVD),etc. Therefore, the computer-readable media can include a non-transitorystorage media. Generally, program modules may include routines,programs, objects, components, data structures, etc. that performparticular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, andprogram modules represent examples of program code for executing stepsof the methods disclosed herein. The particular sequence of suchexecutable instructions or associated data structures representsexamples of corresponding acts for implementing the functions describedin such steps or processes.

Some of the disclosed embodiments can be implemented as devices ormodules using hardware circuits, software, or combinations thereof. Forexample, a hardware circuit implementation can include discrete analogand/or digital components that are, for example, integrated as part of aprinted circuit board. Alternatively, or additionally, the disclosedcomponents or modules can be implemented as an Application SpecificIntegrated Circuit (ASIC) and/or as a Field Programmable Gate Array(FPGA) device. Some implementations may additionally or alternativelyinclude a digital signal processor (DSP) that is a specializedmicroprocessor with an architecture optimized for the operational needsof digital signal processing associated with the disclosedfunctionalities of this application. Similarly, the various componentsor sub-components within each module may be implemented in software,hardware or firmware. The connectivity between the modules and/orcomponents within the modules may be provided using any one of theconnectivity methods and media that is known in the art, including, butnot limited to, communications over the Internet, wired, or wirelessnetworks using the appropriate protocols.

While this document contains many specifics, these should not beconstrued as limitations on the scope of an invention that is claimed orof what may be claimed, but rather as descriptions of features specificto particular embodiments. Certain features that are described in thisdocument in the context of separate embodiments can also be implementedin combination in a single embodiment. Conversely, various features thatare described in the context of a single embodiment can also beimplemented in multiple embodiments separately or in any suitablesub-combination. Moreover, although features may be described above asacting in certain combinations and even initially claimed as such, oneor more features from a claimed combination can in some cases be excisedfrom the combination, and the claimed combination may be directed to asub-combination or a variation of a sub-combination. Similarly, whileoperations are depicted in the drawings in a particular order, thisshould not be understood as requiring that such operations be performedin the particular order shown or in sequential order, or that allillustrated operations be performed, to achieve desirable results.

Only a few implementations and examples are described and otherimplementations, enhancements and variations can be made based on whatis described and illustrated in this disclosure.

What is claimed is:
 1. A wireless communication method, comprising:receiving a reporting configuration associated with one or morereporting criteria, wherein the reporting configuration is linked to oneor more channel state information (CSI) resource settings that provide aconfiguration information, wherein each CSI resource setting identifiesone or more resource sets, and wherein each resource set includes one ormore reference signal resources; generating, according to the one ormore reporting criteria, a report that includes a reference signalreceive power (RSRP), a rank indicator (RI), one or more referencesignal indexes, or information about grouping the one or more referencesignal indexes, wherein each reference signal index is associated with aCSI resource setting index, a reference signal resource set index, areference signal resource index, or a reporting configuration index; andtransmitting the report to a communication node.
 2. The method of claim1, wherein the one or more reporting criteria comprises: one or morecriteria for grouping the one or more reference signal indexes to bereported, wherein the one or more reference signal indexes are groupedinto one or more reference signal groups, a number of reference signal(RS) resources from one resource set or from one CSI resource setting tobe reported, a minimum number of RS resources from one resource set orfrom one CSI resource setting to be reported, a maximum number of RSresources from one resource set or from one CSI resource setting to bereported, a number of resource sets from one CSI resource setting to bereported, a minimum number of resource sets from one CSI resourcesetting to be reported, a maximum number of resource sets from one CSIresource setting to be reported, a maximum number of RS resources or oneRS resource to be reported for one or more subsets of one resource set,or one or more scaling factors to scale one or more measured RSRPsassociated with one or more reference signal indexes or associated withone or more transmission or receive spatial domain filters.
 3. Themethod of claim 2, wherein one of the criteria for grouping referencesignal indexes comprises: a number of groups to be reported, a number ofreference signal indexes per group to be reported, or a number ofreference signal indexes per sub-group to be reported.
 4. The method ofclaim 2, wherein one of the criteria for grouping comprises: a maximumRSRP gap between at least two groups, a maximum RSRP gap between therespective reference signal resources associated with at least twogroups, a maximum RSRP gap between at least two reference signalresources within one group, or a RSRP gap between one reference signaland another reference closest to the one reference signal.
 5. The methodof claim 2, wherein the one or more scaling factors comprises: a firstscaling factor for a transmission spatial domain filter or a referencesignal resource in one resource set or a reference signal resource inone resource setting, wherein the first scaling factor is used to scalea measured RSRP associated with one transmission spatial domain filteror a reference signal resource in one resource set or a reference signalresource in one resource setting, or a second scaling factor for areceive spatial filter, wherein the second scaling factor is used toscale a measured RSRP associated with the receive spatial domain filter.6. The method of claim 2, wherein the one or more reporting criteria isapplied or used per reference signal group to be reported.
 7. The methodof claim 1, wherein the one or more reporting criteria is configured forone reporting configuration, for one or more resource sets, or for oneor more CSI resource settings of the one reporting configuration.
 8. Themethod of claim 1, further comprising: determining RS indexes to bereported based on one or more subsets of one or more resource sets,wherein the one or more subsets of the one or more resource sets aredependent on the one or more reference signal resources that have beendetermined to be reported.
 9. A wireless communication method,comprising: providing, by a communication node to a user equipment, areporting configuration associated with one or more reporting criteria,wherein the reporting configuration is linked to one or more channelstate information (CSI) resource settings that provide a configurationinformation to the user equipment, wherein each CSI resource settingincludes one or more resource sets, and wherein each resource setincludes one or more reference signal resources; and receiving a report,according to the one or more reporting criteria, the report thatincludes a reference signal receive power (RSRP), a rank indicator (RI),one or more reference signal indexes, or information about grouping theone or more reference signal indexes, wherein each reference signalindex is associated with a CSI resource setting index, a referencesignal resource set index, a reference signal resource index, or areporting configuration index.
 10. The method of claim 9, wherein theone or more reporting criteria comprises: one or more criteria forgrouping the one or more reference signal indexes to be reported,wherein the one or more reference signal indexes are grouped into one ormore reference signal groups, a number of reference signal (RS)resources from one resource set or from one CSI resource setting to bereported, a minimum number of RS resources from one resource set or fromone CSI resource setting to be reported, a maximum number of RSresources from one resource set or from one CSI resource setting to bereported, a number of resource sets from one CSI resource setting to bereported, a minimum number of resource sets from one CSI resourcesetting to be reported, a maximum number of resource sets from one CSIresource setting to be reported, a maximum number of RS resources or oneRS resource to be reported for one or more subsets of one resource set,or one or more scaling factors to scale one or more measured RSRPsassociated with one or more reference signal indexes or associated withone or more transmission or receive spatial domain filters.
 11. Themethod of claim 10, wherein one of the criteria for grouping referencesignal indexes comprises: a number of groups to be reported, a number ofreference signal indexes per group to be reported, or a number ofreference signal indexes per sub-group to be reported.
 12. The method ofclaim 10, wherein one of the criteria for grouping comprises: a maximumRSRP gap between at least two groups, a maximum RSRP gap between therespective reference signal resources associated with at least twogroups, a maximum RSRP gap between at least two reference signalresources within one group, or a RSRP gap between one reference signaland another reference closest to the one reference signal.
 13. Themethod of claim 10, wherein the one or more scaling factors comprises: afirst scaling factor for a transmission spatial domain filter or areference signal resource in one resource set or a reference signalresource in one resource setting, wherein the first scaling factor isused to scale a measured RSRP associated with one transmission spatialdomain filter or a reference signal resource in one resource set or areference signal resource in one resource setting, or a second scalingfactor for a receive spatial filter, wherein the second scaling factoris used to scale a measured RSRP associated with the receive spatialdomain filter.
 14. An apparatus for wireless communication, comprising amemory and a processor, wherein the processor is configured to read codefrom the memory and implement a method, comprising:: receive a reportingconfiguration associated with one or more reporting criteria, whereinthe reporting configuration is linked to one or more channel stateinformation (CSI) resource settings that provide a configurationinformation, wherein each CSI resource setting identifies one or moreresource sets, and wherein each resource set includes one or morereference signal resources; generate, according to the one or morereporting criteria, a report that includes a reference signal receivepower (RSRP), a rank indicator (RI), one or more reference signalindexes, or information about grouping the one or more reference signalindexes, wherein each reference signal index is associated with a CSIresource setting index, a reference signal resource set index, areference signal resource index, or a reporting configuration index; andtransmit the report to a communication node.
 15. The apparatus of claim14, wherein the one or more reporting criteria comprises: one or morecriteria for grouping the one or more reference signal indexes to bereported, wherein the one or more reference signal indexes are groupedinto one or more reference signal groups, a number of reference signal(RS) resources from one resource set or from one CSI resource setting tobe reported, a minimum number of RS resources from one resource set orfrom one CSI resource setting to be reported, a maximum number of RSresources from one resource set or from one CSI resource setting to bereported, a number of resource sets from one CSI resource setting to bereported, a minimum number of resource sets from one CSI resourcesetting to be reported, a maximum number of resource sets from one CSIresource setting to be reported, a maximum number of RS resources or oneRS resource to be reported for one or more subsets of one resource set,or one or more scaling factors to scale one or more measured RSRPsassociated with one or more reference signal indexes or associated withone or more transmission or receive spatial domain filters.
 16. Theapparatus of claim 15, wherein the one or more reporting criteria isapplied or used per reference signal group to be reported.
 17. Theapparatus of claim 14, wherein the one or more reporting criteria isconfigured for one reporting configuration, for one or more resourcesets, or for one or more CSI resource settings of the one reportingconfiguration.
 18. An apparatus for wireless communication, comprising amemory and a processor, wherein the processor is configured to read codefrom the memory and implement a method, comprising: provide, by acommunication node to a user equipment, a reporting configurationassociated with one or more reporting criteria, wherein the reportingconfiguration is linked to one or more channel state information (CSI)resource settings that provide a configuration information to the userequipment, wherein each CSI resource setting includes one or moreresource sets, and wherein each resource set includes one or morereference signal resources; and receive a report, according to the oneor more reporting criteria, the report that includes a reference signalreceive power (RSRP), a rank indicator (RI), one or more referencesignal indexes, or information about grouping the one or more referencesignal indexes, wherein each reference signal index is associated with aCSI resource setting index, a reference signal resource set index, areference signal resource index, or a reporting configuration index. 19.The apparatus of claim 18, wherein the one or more reporting criteriacomprises: one or more criteria for grouping the one or more referencesignal indexes to be reported, wherein the one or more reference signalindexes are grouped into one or more reference signal groups, a numberof reference signal (RS) resources from one resource set or from one CSIresource setting to be reported, a minimum number of RS resources fromone resource set or from one CSI resource setting to be reported, amaximum number of RS resources from one resource set or from one CSIresource setting to be reported, a number of resource sets from one CSIresource setting to be reported, a minimum number of resource sets fromone CSI resource setting to be reported, a maximum number of resourcesets from one CSI resource setting to be reported, a maximum number ofRS resources or one RS resource to be reported for one or more subsetsof one resource set, or one or more scaling factors to scale one or moremeasured RSRPs associated with one or more reference signal indexes orassociated with one or more transmission or receive spatial domainfilters.
 20. The apparatus of claim 19, wherein one of the criteria forgrouping reference signal indexes comprises: a number of groups to bereported, a number of reference signal indexes per group to be reported,or a number of reference signal indexes per sub-group to be reported.